Improvement in lifting-jacks



UNITED STATES PATENT Orrrou.

HENRY H. WARREN, OF BUFFALO, NEW YORK.

IMPROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent No. 138,059, dated April 22, 1873; application flied January 22, 1873.

To all whom it may concern:

Be it known that I, HENRY HARRISON WAR- REN, of Buffalo, in the county of Erie and State of New York, have invented certain newanduseful Improvements inWagon-Jacks, of which the following is a specification:

This invention relates to that class of carriage or wagon jacks in which an adjustable lever works in an upright frame or standard; and the invention consists in providing said standard with two oblong slots and with lugs or teeth for the support of a foot-catch or pawl upon the lifting-lever, said slot-s being also provided with bearing pins or bolts for the support of the lifting-lever, the lugs or pins of one slot alternating with those of the other, so as to obtain a greater variation of the adjustability of the lever. The invention also consists in an arrangement of devices for securing the lever upright against the standard when not in use, as hereinafter explained.

In the drawing, Figure l is a perspective view of the device as in operation. Fig. 2 is a cross-section, showing the position of the lever.

A is a wooden standard or frame, formed with two oblong openings, B B, for the reception of the operating-lever G. In the outer sides of these slots B are secured two metal strips, D D, having lugs or catches a projecting out beyond the surface of the frame A, the lugs of one plate coming between those of the other as shown. The division-piece between the two slots is also provided with a metallic strip, E, having similar lugs b b on either edge, those on one side being in line with those on plate D, while those on the other are in line with those on plate D, thus forming two rows of teeth in alternate position with each other, giving, when in operation, greater or less leverage, as may be required. These lugs receive a pawl or footcatch, F, hinged to the lever G. The lever is made with an opening in the under side, which sets on pins or bolts 0 chaving their bearings in the wood and extending across the slots B B, the pins in one slot alternating with those in the other, similar to the lugs a b, by which means the lever may be placed at any height desired, and thus enable it to be used for any sized vehicle, and by means of the alternately-arranged pinsin the double slots a greater number of elevations is secured than if a single slot and bearing-pin were used.

I do not wish to confine myself to the exact construction and arrangement of the plates and catches. The metal piece E may-be replaced by two pieces similar to D D 3 but I prefer it of the form shown, as being more simple and easier to apply; or the plates may be dispensed with altogether and teeth alone use To enable the jack to be compactly arranged and occupy less space when not in use, the lever 0 is removed from the slots and placed upright with its toe d in the recess 6 in the base of the standard A, and beneath a pin or catch therein, while its upper endis held by a loop, f, on top of the standard, and a hook, g, on the lever, as shown in Fig. 1, and by which means also the jack can be lifted by the lever-handle and moved from place to place.

The advantages of this construction are many.

On account of its adjustability, its. greater or less leverage, it may be used for a great Variety of vehicles, is not liable to get out of order, is light and easily moved about, and can be compactly arranged within a small space.

Claims. I claim-- 1. The standard A having double slots or 'openingsB B, bearing-pins c c, and the catches or lugs a b or their equivalents, in combination with the lever O and pawl F, all arranged and operating substantially as described.

2. In combination therewith the button or catch g, toe d, recess 0, and loop f, arranged and operating as and for the purpose set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HENRY H. WARREN. Witnesses:

J. R. DRAKE,

O. N. WooDwARn. 

